Is Firefox ALSO affected by the Microsoft ANI vulnerability?

A report on ZDNet (UK) suggests that the animated cursor vulnerability just patched in yesterday's Microsoft Security Bulletin MS07-017 can also make Firefox browsers running in a Windows environment vulnerable to the threat.

The individual who initially reported the ANI vulnerability privately to Microsoft, Alexander Sotirov of Determina, has told ZDNet.uk.co, "Firefox uses a Windows API function, which uses the vulnerable code in USER32.DLL, so the .ani vulnerability can be exploited through Firefox."